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粗集公理组的极小化 被引量:14
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作者 孙辉 刘大有 李文 《计算机学报》 EI CSCD 北大核心 2002年第2期202-209,共8页
粗集公理化是粗集理论研究的一个重要部分 ,它的目标是获得可靠和极小的粗集公理组 .以往文献在这一研究中取得了有意义的进展 ,给出了若干组粗集公理 .但是 ,它们在粗集公理的表示形式、粗集公理组的极小化以及粗集公理组的可靠性证明... 粗集公理化是粗集理论研究的一个重要部分 ,它的目标是获得可靠和极小的粗集公理组 .以往文献在这一研究中取得了有意义的进展 ,给出了若干组粗集公理 .但是 ,它们在粗集公理的表示形式、粗集公理组的极小化以及粗集公理组的可靠性证明中 ,尚未达到粗集公理化的理想目标 .该文在以往文献的基础上 ,研究了粗集公理组的极小化 .首先 ,去除了现有粗集公理组中隐含着的冗余性 ,得到了更为精练的两组粗集公理 ,并证明了它们的可靠性 ;其次 ,定义了极小粗集公理组概念 ,并证明了给出的两组粗集公理是极小的 ;最后 ,讨论了一个典型粗集公理组 S5 。 展开更多
关键词 极小化 粗集公理组 粗集理论 人工智能
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Goldbach猜想对于Peano公理组的条件独立性─—对一些数论问题的逻辑讨论(Ⅰ) 被引量:4
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作者 王世强 《北京师范大学学报(自然科学版)》 CAS CSCD 北大核心 2001年第4期452-455,共4页
用模型论方法证明了,在对于自然数系的Goldbach猜想及一阶Peano公理组的某种等 价表述下,前者在逻辑上独立于后者.此外,还宣布了一些其他结果.
关键词 GOLDBACH猜想 Peano公理组 模型论 数论 整数环 逻辑
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n素元组猜想对于Peano公理组的条件独立性
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作者 马鑫 沈复兴 《北京师范大学学报(自然科学版)》 CAS CSCD 北大核心 2013年第4期333-334,共2页
用模型论的方法证明了一类n素元组猜想独立于一公理组,此公理组在自然数系N上是与Peano算数公理组等价的.
关键词 n素元 Peano公理组 紧致性定理 模型
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三素元组猜想对于Peano公理组的条件独立性
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作者 马鑫 沈复兴 《北京师范大学学报(自然科学版)》 CAS CSCD 北大核心 2008年第4期360-361,共2页
用模型论的方法证明了一类三素元组猜想独立于一公理组,此公理组在自然数系N上是与Peano算数公理组等价的.
关键词 三素元 Peano公理组 紧致性定理 模型
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概念格的公理化 被引量:5
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作者 陈锦坤 李进金 《计算机工程与应用》 CSCD 2012年第5期41-43,共3页
概念格是数据分析和知识表示的一种有效工具。研究概念格的公理化问题。得到了两组关于概念格的公理组,且每组含有六个独立的公理。公理化的研究有助于概念格理论的进一步完善。
关键词 概念格 形式背景 公理组
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Goldbach猜想等与PA的一些联系——对一些数论问题的逻辑讨论(Ⅱ) 被引量:5
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作者 王世强 《北京师范大学学报(自然科学版)》 CAS CSCD 北大核心 2002年第2期183-186,共4页
用模型论方法证明了Goldbach猜想和孪生素数猜想等的一些形式都独立于一组公理P1(而P1在自然数系N上与Peano公理组PA等价 ) .又证明了它们与一组较强的公理P2 相和谐(P2 也在N上与PA等价 ) .
关键词 GOLDBACH猜想 孪生素数猜想 Peano公理组 模型论
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一类素数问题等对PA的条件独立性——对一些数论问题的逻辑讨论(Ⅳ) 被引量:1
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作者 王世强 别荣芳 《北京师范大学学报(自然科学版)》 CAS CSCD 北大核心 2004年第5期579-581,共3页
用模型论方法证明了 2次函数素数值问题及一种 3重完美数问题对于PA的条件独立性 ,以及一些更一般的结论 .
关键词 2次函数素数值 多重完美数 Peano公理组 模型论
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完美数与亲和数问题对PA的条件独立性——对一些数论问题的逻辑讨论(Ⅲ) 被引量:3
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作者 王世强 《北京师范大学学报(自然科学版)》 CAS CSCD 北大核心 2002年第3期310-312,共3页
用模型论方法证明了 ,对于在自然数系N上与PA等价的一组公理P1而言 ,N中一类特殊完美数的无限性是独立于P1的 .并且 ,N中一类特殊亲和数的无限性也是独立于P1的 .
关键词 亲和数问题 PA 条件独立性 数论 完美数问题 Peano公理组 模型论 紧致性定理
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离散资源分配问题的最优方法
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作者 孙建新 《绍兴文理学院学报》 2013年第7期12-16,共5页
考虑到离散资源分配的公理存在极大相容公理组,根据离散资源的不同类型分别给出相应的最优分配方法.
关键词 紧(宽)约束 极大相容公理组 资源永久性(暂存性) 资源共享性(独占性) 时变性(时不变性)
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Multistage Stochastic Programming Model for the Portfolio Problem of a Property-Liability Insurance Company 被引量:3
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作者 王春峰 杨建林 蒋祥林 《Transactions of Tianjin University》 EI CAS 2002年第3期203-206,共4页
The current portfolio model for property-liability insurance company is only single period that can not meet the practical demands of portfolio management, and the purpose of this paper is to develop a multiperiod mod... The current portfolio model for property-liability insurance company is only single period that can not meet the practical demands of portfolio management, and the purpose of this paper is to develop a multiperiod model for its portfolio problem. The model is a multistage stochastic programming which considers transaction costs, cash flow between time periods, and the matching of asset and liability; it does not depend on the assumption for normality of return distribution. Additionally, an investment constraint is added. The numerical example manifests that the multiperiod model can more effectively assist the property-liability insurer to determine the optimal composition of insurance and investment portfolio and outperforms the single period one. 展开更多
关键词 property-liability insurance company portfolio management multiperiod model multistage stochastic programming
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Diversification or splitting-an explanation based on Contract Theory
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作者 罗良忠 史占中 《Journal of Zhejiang University-Science A(Applied Physics & Engineering)》 SCIE EI CAS CSCD 2005年第4期329-333,共5页
By inserting the variable of the exactness of corporate valuation into the classic model of Contract Theory, this paper, on the bases of the interaction of the variables of the veraciousness of corporate valuation, ma... By inserting the variable of the exactness of corporate valuation into the classic model of Contract Theory, this paper, on the bases of the interaction of the variables of the veraciousness of corporate valuation, managerial incentives and operational risks, explores the deep-seated reasons for changes in corporate structures, and draws the conclusion that the divestment of the subsidiary is beneficial to shareholders when the parent corporate is undervalued and that the relation between the parent and the subsidiary is disordered, or vice versa. This conclusion is consistent with the motives of many divestiture cases in reality. 展开更多
关键词 DIVERSIFICATION SPECIALIZATION DIVESTMENT Contract Theory
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Corporate innovation behavior and internal governance mechanism
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作者 WANG Xue 《Chinese Business Review》 2010年第7期58-62,共5页
Innovation is a process results in new products, methods of production and forms of business organization. Innovation can vastly improve the welfare of consumers, investors, firms and the economy. However, there is re... Innovation is a process results in new products, methods of production and forms of business organization. Innovation can vastly improve the welfare of consumers, investors, firms and the economy. However, there is relatively limited evidence of how corporate governance affects corporate innovation. In this study, the author theoretically demonstrates how internal governance mechanisms interact to affect innovation, such as internal control, monitoring and compensation contracts. Governance mechanisms are determined by firm characteristics. The "best" governance structures that can be adopted universally do not exist. However, innovative firms often share similar characteristics, and they adopt similar governance mechanisms to facilitate innovation. The ultimate purpose of such internal governance mechanism that facilitates innovation is to prevent managers' myopia, and this paper concludes 5 different roles in internal governance mechanism that facilitate corporate innovation behavior. 展开更多
关键词 corporate innovation behavior corporate governance financial endowments
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Analyzing on the Characteristics of Several Typical Financial Behavior of Loss Listed Companies in China
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作者 Du Yong Chen Jianying 《Chinese Business Review》 2013年第3期204-216,共13页
In combination with socio-economic development of China's current status, this article analyzes the characteristics of several typical financial behavior of loss listed companies in China. Among them, the debt financ... In combination with socio-economic development of China's current status, this article analyzes the characteristics of several typical financial behavior of loss listed companies in China. Among them, the debt financing behavior have a high level, a single means, a short-term structured and other characteristics, the corporate governance behavior have a goal of collaborative, several forms, and a complex environment, the earnings management behavior have diverse motives, many types of means, bigger range and other features, the asset restructuring behavior have a passive subject, methods of differentiation, performance-oriented features such as myopia. 展开更多
关键词 LOSS financial behavior debt financing asset restructuring corporate governance earnings management
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Novel Hyper-Combined Public Key Based Cloud Storage Key Management Scheme
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作者 SONG Ningning CHEN Yucyun 《China Communications》 SCIE CSCD 2014年第A02期185-194,共10页
In order to ensure the security of cloud storage, on the basis of the analysis of cloud storage security requirements, this paper puts forward a kind of" hidden mapping hyper-combined public key management scheme... In order to ensure the security of cloud storage, on the basis of the analysis of cloud storage security requirements, this paper puts forward a kind of" hidden mapping hyper-combined public key management scheme based on the hyperelliptic curve crypto system, which is applicable to the distributed cloud storage. A series of operation processes of the key management are elaborated, including key distribution, key updating and key agreement, etc. Analysis shows that the scheme can solve the problem of large-scale key management and storage issues in cloud storage effectively. The scheme feathers high efficiency and good scalability. It is able to resist collusion attack and ensure safe and reliable service provided by the cloud storaee system 展开更多
关键词 cloud storage hyperelliptic curve combined public key key management hiddenmapping
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Tracing Ultimate Shareholders' Double Control Chain in Listed Companies- Using the Theory of Organizational Routine Evolution
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作者 Gao Chuang Guo Bin 《China Economist》 2013年第6期112-123,共12页
Based on the epistemology and methodology of organizational routine evolution, this paper presents a systematic analysis on how ultimate shareholders control listed companies by means of equity control chain in a pyra... Based on the epistemology and methodology of organizational routine evolution, this paper presents a systematic analysis on how ultimate shareholders control listed companies by means of equity control chain in a pyramid structure and social capital control chain hidden in social networks. First, this paper examines the internal logic of ultimate shareholders' double control chain and designs an iterative model for dynamic evolution intent proceeding from ultimate shareholders 'degree of intent for social capital control. Finally, with the case study of Inner Mongolia Caoyuan Xingfa Co., Ltd., this paper reveals the process and mechanism of ultimate shareholders' creation of double control chain. 展开更多
关键词 ultimate shareholders equity control chain social capital control chain routine evolution
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席位分配公理的相容性与完备性 被引量:3
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作者 孙建新 《数学的实践与认识》 CSCD 北大核心 2011年第4期78-84,共7页
在原有的分配公理以外提出了若干新的公理,讨论了分配公理与数学模型之间的关系,然后给出极大相容公理组.
关键词 代表率 分配率 紧(宽)约束 普适性 无偏性 极大相容公理组
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Developing Public Sector Cost Accounting Systems Case Finnish Defence Forces
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作者 Timo Hyvonen Salme Nasi +2 位作者 Jukka Pellinen Janne Jarvinen Tapani Rahko 《Journal of Modern Accounting and Auditing》 2011年第2期97-110,共14页
This paper addresses the relationship between "new" and the "old" public performance management; the dialogue between imported idealistic designs and the inherently stable existing (performance) management syste... This paper addresses the relationship between "new" and the "old" public performance management; the dialogue between imported idealistic designs and the inherently stable existing (performance) management systems (Carmona & Gronlund, 2003; Hyvonen, Jairvinen, Pellinen, & Rahko, 2009; Scapens & Ter Bogt, 2009). We see the co-existence of imported and traditional, both idealistic and realistic models of performance management as problematic. Such performance management models are based on different institutional logics that are the taken-for-granted rules guiding behavior of field-level actors, and related practices that predominate in an organizational field. These logics help to explain connections that create a sense of common purpose and unity within an organizational field (Scott, 2001; Kitchener, 2002). The purpose of this paper is to analyze and illustrate how institutional pressures for management accounting change are formed. Most studies on change and stability of management accounting pay little attention on how institutional pressures for accounting change are formed, especially on the political field level. Our study demonstrates how various actors at the political field level participate in creating institutional pressures in diverse and sometimes contradictory ways. Drawing on archival data and 20 interviews with public officials, we seek to illustrate how different organizational field-level actors' views on implementing cost accounting differ, and how these views have influenced the outcome of cost accounting development in the Finnish Defence Forces. Our results suggest that contradictory institutional logics exist in relation with Finnish central government management-by-results, performance management and cost accounting systems. A value-for-money ideology in the armed forces sector (see e.g., Gr6nlund & Catasus, 2005) at times seems to challenge and even contradict the "legalistic" tradition of developing cost accounting that conforms to budgetary laws and statues. Similarly, the New Public Management based performance prism model (Fryer, Antony, & Ogden, 2009; Neely, Adams, & Crowe, 2001), when implemented at a local level, seems to conflict with notions common in accounting literature, according to which management accounting systems should be aligned with organizations' strategy and structure (see e.g., Abemethy, Lillis, Brownell, & Carter, 2001). 展开更多
关键词 management-by-results performance management cost accounting MILITARY
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Corporate Sustainability and Ethical Codes Effectiveness
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作者 Daniela M. Salvioni Riccardo Astori Raffaella Cassano 《Journal of Modern Accounting and Auditing》 2014年第9期969-982,共14页
In the last years, the issues regarding both sustainable development and business global responsibility have qualified the corporate governance effectiveness. Many international institutions have intervened and the co... In the last years, the issues regarding both sustainable development and business global responsibility have qualified the corporate governance effectiveness. Many international institutions have intervened and the companies, at least formally, have increased their attention to the interaction between stakeholder relationship management and economic, social, and environmental responsibility. The numerous and frequent scandals underline the discrepancy between the firms' formal statements and the substantial behaviors. Most of the companies, in the industrialized country, publish well-structured code of ethics and conduct, explicating the strategic values assigned to the global responsibility. The research considers the capability of the code of conduct to influence effectively the behaviors, in relation with the needs of transparency, sharing, coherent individual behavior, and control. In relation to the importance conferred to the sustainable development by the European Union (EU), the analysis examines listed companies with the greatest market capitalization operating in the Great Britain, Germany, and Italy, in order to verify the firms' behavioral uniformity and the effectiveness of sustainability policies. The analysis shows that the codes of ethics seem to remain only formal declarations. Conscious and rational governance not only transfers values and principles of sustainability to the firm's behaviors and its result system, but also goes beyond a mere diffusion and formalization of codes of ethics and conducts. To achieve that, it is necessary to develop productive behaviors focused on the risk control and on managing behaviors of all the organization's members, in particular in reference to the stakeholder relationship management. The codes of ethics, in fact, seem to assume a poor relevance for the corporate sustainability promotion if a correct formal structure does not occur integrated with strategies and processes which assure a constant workability. It requests especially: the ethic culture diffusion and sharing of related values and principles; definition and integration of critical success dimensions in relation to economic, environmental, and ecological responsibility; and identification of relevant ethical parameters and control of their observance. 展开更多
关键词 sustainable development MANAGEMENT internal control risk management
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Toyota Motor Corporation: Organizational Culture
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作者 Sergey Sosnovskikh 《Journal of Philosophy Study》 2016年第7期442-454,共13页
This paper investigates the organizational culture of one of the largest auto manufacturers in the world Toyota Motor Corporation using various corporate culture and management models. The investigation was conducted ... This paper investigates the organizational culture of one of the largest auto manufacturers in the world Toyota Motor Corporation using various corporate culture and management models. The investigation was conducted in 2009 using qualitative analysis with the help of various secondary sources. The study reveals that the company's management style can be characterized as the Family type that implies collectivistic society with male domination, strict rules and laws at work, and long-term orientation. It is also based on several essential principles, such as continuous improvement and learning, respect for people, mutual trust, and teamwork. Two core elements of the Toyota's success are technological innovations and qualified human resources. 展开更多
关键词 Toyota Motor Corporation organizational culture management model Japanese culture HOFSTEDE KAIZEN
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Strategic Management Development From the State-Owned Company to the Private Company
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作者 Koldo Zabalza Jesus Matey 《Journal of Modern Accounting and Auditing》 2011年第1期48-58,共11页
The privatization of a firm entails a thoroughgoing process of reform that includes the introduction of new management practices. A review of the theoretical and empirical studies conducted allows us to confirm that a... The privatization of a firm entails a thoroughgoing process of reform that includes the introduction of new management practices. A review of the theoretical and empirical studies conducted allows us to confirm that a systematic analysis of the contextual, organizational and strategic factors that arise after a public company's privatization does not exist. This study explores the changes in strategic management that take place after a public company's privatization and proposes a theoretical global analysis model that facilitates their analysis. In order to confirm the theoretical propositions posed, the contemporary multiple case study was used as a research methodology. In particular, the changes experienced in the strategic management area in four privatized Spanish companies were investigated along the lines of a longitudinal analysis. The results of this study show that most theoretical propositions are confirmed or tend to be, according to the evidence shown by the firms in the sample. In addition, a comparative analysis of the different firms' behaviors by following the structure constructed on the basis of the three areas (strategies, objectives and organizational structure) leads to the conclusion that all these areas are relevant to the process of change in a privatized firm's strategic management. 展开更多
关键词 strategies objectives organizational structure effects of privatization case study
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